It really should've been left alone the whole first week to settle, get used to it's new surroundings and de-stress from the move.
I would tell her honestly that it's in the best interest of the snake to be left alone to process his meal and explain what could happen (i.e. regurg) if he's messed with after having eaten. I'm sure you love her and don't want to hurt her feelings or discourage her from something that could be a mutual interest, but the health of the animal isn't something you'll want to put at risk for the sake of sugar coating the potential consequences. Just be tactful, but honest. Regurg has it's own set of risks beyond just a missed meal, and imo it's just not worth it for a few moments of interaction.